# Relationship history for MSHA mine 1517049

Current hierarchy: **Dennis  Jones → Jones Branch Coal Company Inc → #7**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Dennis  Jones → #7; 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Hunt → #7; 1988-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Fannin et al → #7; 1989-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amba Energy → #7; 1991-03-01 to 1991-12-17; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Hunt → Amba Energy; 1991-03-01 to 1991-12-17; source msha-controller-operator-history
- **operator_operates_mine:** Mike J Enterprises Inc → #7; 1991-12-18 to 1993-07-08; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Fannin et al → Mike J Enterprises Inc; 1991-12-18 to 1993-07-08; source msha-controller-operator-history
- **operator_operates_mine:** Jones Branch Coal Company Inc → #7; 1993-07-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Jones → Jones Branch Coal Company Inc; 1993-07-09 to current/open; source msha-controller-operator-history